Gather together 1/2 cup of baking soda, 3 tablespoons of water, a small bowl, white vinegar, a spray bottle, a spatula and a kitchen towel or dish cloth to clean your oven.
Remove racks and anything that you store inside of your oven.
Mix 3 tablespoons of water and 1/2 cup of baking soda in a small bowl to form a paste.
Spread the paste over the walls and other interior surfaces in your oven. Do not coat the heating elements. Allow the baking soda paste to sit for about 12 hours.
Wipe the baking soda paste out of the oven with a damp cloth. If the paste is difficult to remove, scrape it with a plastic spatula.
Pour white vinegar in a clean spray bottle. Spritz any remaining baking soda residue with the white vinegar and wipe clean.
Clean the oven racks and replace them in the oven.